1 /*- 2 * Copyright (c) 1994-1995 Søren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_compat.h" 33 34 #include <sys/param.h> 35 #include <sys/capsicum.h> 36 #include <sys/dirent.h> 37 #include <sys/file.h> 38 #include <sys/filedesc.h> 39 #include <sys/proc.h> 40 #include <sys/malloc.h> 41 #include <sys/mount.h> 42 #include <sys/namei.h> 43 #include <sys/stat.h> 44 #include <sys/syscallsubr.h> 45 #include <sys/systm.h> 46 #include <sys/tty.h> 47 #include <sys/vnode.h> 48 #include <sys/conf.h> 49 #include <sys/fcntl.h> 50 51 #ifdef COMPAT_LINUX32 52 #include <machine/../linux32/linux.h> 53 #include <machine/../linux32/linux32_proto.h> 54 #else 55 #include <machine/../linux/linux.h> 56 #include <machine/../linux/linux_proto.h> 57 #endif 58 59 #include <compat/linux/linux_util.h> 60 #include <compat/linux/linux_file.h> 61 62 63 static void 64 translate_vnhook_major_minor(struct vnode *vp, struct stat *sb) 65 { 66 int major, minor; 67 68 if (vp->v_type == VCHR && vp->v_rdev != NULL && 69 linux_driver_get_major_minor(devtoname(vp->v_rdev), 70 &major, &minor) == 0) { 71 sb->st_rdev = (major << 8 | minor); 72 } 73 } 74 75 static int 76 linux_kern_statat(struct thread *td, int flag, int fd, char *path, 77 enum uio_seg pathseg, struct stat *sbp) 78 { 79 80 return (kern_statat(td, flag, fd, path, pathseg, sbp, 81 translate_vnhook_major_minor)); 82 } 83 84 static int 85 linux_kern_stat(struct thread *td, char *path, enum uio_seg pathseg, 86 struct stat *sbp) 87 { 88 89 return (linux_kern_statat(td, 0, AT_FDCWD, path, pathseg, sbp)); 90 } 91 92 static int 93 linux_kern_lstat(struct thread *td, char *path, enum uio_seg pathseg, 94 struct stat *sbp) 95 { 96 97 return (linux_kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, path, 98 pathseg, sbp)); 99 } 100 101 static void 102 translate_fd_major_minor(struct thread *td, int fd, struct stat *buf) 103 { 104 struct file *fp; 105 struct vnode *vp; 106 cap_rights_t rights; 107 int major, minor; 108 109 /* 110 * No capability rights required here. 111 */ 112 if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) || 113 fget(td, fd, cap_rights_init(&rights), &fp) != 0) 114 return; 115 vp = fp->f_vnode; 116 if (vp != NULL && vp->v_rdev != NULL && 117 linux_driver_get_major_minor(devtoname(vp->v_rdev), 118 &major, &minor) == 0) { 119 buf->st_rdev = (major << 8 | minor); 120 } else if (fp->f_type == DTYPE_PTS) { 121 struct tty *tp = fp->f_data; 122 123 /* Convert the numbers for the slave device. */ 124 if (linux_driver_get_major_minor(devtoname(tp->t_dev), 125 &major, &minor) == 0) { 126 buf->st_rdev = (major << 8 | minor); 127 } 128 } 129 fdrop(fp, td); 130 } 131 132 static int 133 newstat_copyout(struct stat *buf, void *ubuf) 134 { 135 struct l_newstat tbuf; 136 137 bzero(&tbuf, sizeof(tbuf)); 138 tbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8); 139 tbuf.st_ino = buf->st_ino; 140 tbuf.st_mode = buf->st_mode; 141 tbuf.st_nlink = buf->st_nlink; 142 tbuf.st_uid = buf->st_uid; 143 tbuf.st_gid = buf->st_gid; 144 tbuf.st_rdev = buf->st_rdev; 145 tbuf.st_size = buf->st_size; 146 tbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 147 tbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 148 tbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 149 tbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 150 tbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 151 tbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 152 tbuf.st_blksize = buf->st_blksize; 153 tbuf.st_blocks = buf->st_blocks; 154 155 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 156 } 157 158 int 159 linux_newstat(struct thread *td, struct linux_newstat_args *args) 160 { 161 struct stat buf; 162 char *path; 163 int error; 164 165 LCONVPATHEXIST(td, args->path, &path); 166 167 #ifdef DEBUG 168 if (ldebug(newstat)) 169 printf(ARGS(newstat, "%s, *"), path); 170 #endif 171 172 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 173 LFREEPATH(path); 174 if (error) 175 return (error); 176 return (newstat_copyout(&buf, args->buf)); 177 } 178 179 int 180 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 181 { 182 struct stat sb; 183 char *path; 184 int error; 185 186 LCONVPATHEXIST(td, args->path, &path); 187 188 #ifdef DEBUG 189 if (ldebug(newlstat)) 190 printf(ARGS(newlstat, "%s, *"), path); 191 #endif 192 193 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &sb); 194 LFREEPATH(path); 195 if (error) 196 return (error); 197 return (newstat_copyout(&sb, args->buf)); 198 } 199 200 int 201 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 202 { 203 struct stat buf; 204 int error; 205 206 #ifdef DEBUG 207 if (ldebug(newfstat)) 208 printf(ARGS(newfstat, "%d, *"), args->fd); 209 #endif 210 211 error = kern_fstat(td, args->fd, &buf); 212 translate_fd_major_minor(td, args->fd, &buf); 213 if (!error) 214 error = newstat_copyout(&buf, args->buf); 215 216 return (error); 217 } 218 219 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 220 static int 221 stat_copyout(struct stat *buf, void *ubuf) 222 { 223 struct l_stat lbuf; 224 225 bzero(&lbuf, sizeof(lbuf)); 226 lbuf.st_dev = buf->st_dev; 227 lbuf.st_ino = buf->st_ino; 228 lbuf.st_mode = buf->st_mode; 229 lbuf.st_nlink = buf->st_nlink; 230 lbuf.st_uid = buf->st_uid; 231 lbuf.st_gid = buf->st_gid; 232 lbuf.st_rdev = buf->st_rdev; 233 if (buf->st_size < (quad_t)1 << 32) 234 lbuf.st_size = buf->st_size; 235 else 236 lbuf.st_size = -2; 237 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 238 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 239 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 240 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 241 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 242 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 243 lbuf.st_blksize = buf->st_blksize; 244 lbuf.st_blocks = buf->st_blocks; 245 lbuf.st_flags = buf->st_flags; 246 lbuf.st_gen = buf->st_gen; 247 248 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 249 } 250 251 int 252 linux_stat(struct thread *td, struct linux_stat_args *args) 253 { 254 struct stat buf; 255 char *path; 256 int error; 257 258 LCONVPATHEXIST(td, args->path, &path); 259 260 #ifdef DEBUG 261 if (ldebug(stat)) 262 printf(ARGS(stat, "%s, *"), path); 263 #endif 264 error = linux_kern_stat(td, path, UIO_SYSSPACE, &buf); 265 if (error) { 266 LFREEPATH(path); 267 return (error); 268 } 269 LFREEPATH(path); 270 return (stat_copyout(&buf, args->up)); 271 } 272 273 int 274 linux_lstat(struct thread *td, struct linux_lstat_args *args) 275 { 276 struct stat buf; 277 char *path; 278 int error; 279 280 LCONVPATHEXIST(td, args->path, &path); 281 282 #ifdef DEBUG 283 if (ldebug(lstat)) 284 printf(ARGS(lstat, "%s, *"), path); 285 #endif 286 error = linux_kern_lstat(td, path, UIO_SYSSPACE, &buf); 287 if (error) { 288 LFREEPATH(path); 289 return (error); 290 } 291 LFREEPATH(path); 292 return (stat_copyout(&buf, args->up)); 293 } 294 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 295 296 struct l_statfs { 297 l_long f_type; 298 l_long f_bsize; 299 l_long f_blocks; 300 l_long f_bfree; 301 l_long f_bavail; 302 l_long f_files; 303 l_long f_ffree; 304 l_fsid_t f_fsid; 305 l_long f_namelen; 306 l_long f_frsize; 307 l_long f_flags; 308 l_long f_spare[4]; 309 }; 310 311 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 312 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 313 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 314 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 315 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 316 #define LINUX_NCP_SUPER_MAGIC 0x564cL 317 #define LINUX_NFS_SUPER_MAGIC 0x6969L 318 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 319 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 320 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 321 #define LINUX_ZFS_SUPER_MAGIC 0x2FC12FC1 322 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 323 #define LINUX_SHMFS_MAGIC 0x01021994 324 325 static long 326 bsd_to_linux_ftype(const char *fstypename) 327 { 328 int i; 329 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 330 {"ufs", LINUX_UFS_SUPER_MAGIC}, 331 {"zfs", LINUX_ZFS_SUPER_MAGIC}, 332 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 333 {"nfs", LINUX_NFS_SUPER_MAGIC}, 334 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 335 {"procfs", LINUX_PROC_SUPER_MAGIC}, 336 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 337 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 338 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 339 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 340 {"coda", LINUX_CODA_SUPER_MAGIC}, 341 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 342 {"tmpfs", LINUX_SHMFS_MAGIC}, 343 {NULL, 0L}}; 344 345 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 346 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 347 return (b2l_tbl[i].linux_type); 348 349 return (0L); 350 } 351 352 static int 353 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 354 { 355 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 356 uint64_t tmp; 357 358 #define LINUX_HIBITS 0xffffffff00000000ULL 359 360 tmp = bsd_statfs->f_blocks | bsd_statfs->f_bfree | bsd_statfs->f_files | 361 bsd_statfs->f_bsize; 362 if ((bsd_statfs->f_bavail != -1 && (bsd_statfs->f_bavail & LINUX_HIBITS)) || 363 (bsd_statfs->f_ffree != -1 && (bsd_statfs->f_ffree & LINUX_HIBITS)) || 364 (tmp & LINUX_HIBITS)) 365 return (EOVERFLOW); 366 #undef LINUX_HIBITS 367 #endif 368 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 369 linux_statfs->f_bsize = bsd_statfs->f_bsize; 370 linux_statfs->f_blocks = bsd_statfs->f_blocks; 371 linux_statfs->f_bfree = bsd_statfs->f_bfree; 372 linux_statfs->f_bavail = bsd_statfs->f_bavail; 373 linux_statfs->f_ffree = bsd_statfs->f_ffree; 374 linux_statfs->f_files = bsd_statfs->f_files; 375 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 376 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 377 linux_statfs->f_namelen = MAXNAMLEN; 378 linux_statfs->f_frsize = bsd_statfs->f_bsize; 379 linux_statfs->f_flags = 0; 380 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 381 382 return (0); 383 } 384 385 int 386 linux_statfs(struct thread *td, struct linux_statfs_args *args) 387 { 388 struct l_statfs linux_statfs; 389 struct statfs *bsd_statfs; 390 char *path; 391 int error; 392 393 LCONVPATHEXIST(td, args->path, &path); 394 395 #ifdef DEBUG 396 if (ldebug(statfs)) 397 printf(ARGS(statfs, "%s, *"), path); 398 #endif 399 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 400 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 401 LFREEPATH(path); 402 if (error == 0) 403 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 404 free(bsd_statfs, M_STATFS); 405 if (error != 0) 406 return (error); 407 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 408 } 409 410 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 411 static void 412 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 413 { 414 415 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 416 linux_statfs->f_bsize = bsd_statfs->f_bsize; 417 linux_statfs->f_blocks = bsd_statfs->f_blocks; 418 linux_statfs->f_bfree = bsd_statfs->f_bfree; 419 linux_statfs->f_bavail = bsd_statfs->f_bavail; 420 linux_statfs->f_ffree = bsd_statfs->f_ffree; 421 linux_statfs->f_files = bsd_statfs->f_files; 422 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 423 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 424 linux_statfs->f_namelen = MAXNAMLEN; 425 linux_statfs->f_frsize = bsd_statfs->f_bsize; 426 linux_statfs->f_flags = 0; 427 memset(linux_statfs->f_spare, 0, sizeof(linux_statfs->f_spare)); 428 } 429 430 int 431 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 432 { 433 struct l_statfs64 linux_statfs; 434 struct statfs *bsd_statfs; 435 char *path; 436 int error; 437 438 if (args->bufsize != sizeof(struct l_statfs64)) 439 return EINVAL; 440 441 LCONVPATHEXIST(td, args->path, &path); 442 443 #ifdef DEBUG 444 if (ldebug(statfs64)) 445 printf(ARGS(statfs64, "%s, *"), path); 446 #endif 447 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 448 error = kern_statfs(td, path, UIO_SYSSPACE, bsd_statfs); 449 LFREEPATH(path); 450 if (error == 0) 451 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 452 free(bsd_statfs, M_STATFS); 453 if (error != 0) 454 return (error); 455 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 456 } 457 458 int 459 linux_fstatfs64(struct thread *td, struct linux_fstatfs64_args *args) 460 { 461 struct l_statfs64 linux_statfs; 462 struct statfs *bsd_statfs; 463 int error; 464 465 #ifdef DEBUG 466 if (ldebug(fstatfs64)) 467 printf(ARGS(fstatfs64, "%d, *"), args->fd); 468 #endif 469 if (args->bufsize != sizeof(struct l_statfs64)) 470 return (EINVAL); 471 472 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 473 error = kern_fstatfs(td, args->fd, bsd_statfs); 474 if (error == 0) 475 bsd_to_linux_statfs64(bsd_statfs, &linux_statfs); 476 free(bsd_statfs, M_STATFS); 477 if (error != 0) 478 return (error); 479 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 480 } 481 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 482 483 int 484 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 485 { 486 struct l_statfs linux_statfs; 487 struct statfs *bsd_statfs; 488 int error; 489 490 #ifdef DEBUG 491 if (ldebug(fstatfs)) 492 printf(ARGS(fstatfs, "%d, *"), args->fd); 493 #endif 494 bsd_statfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); 495 error = kern_fstatfs(td, args->fd, bsd_statfs); 496 if (error == 0) 497 error = bsd_to_linux_statfs(bsd_statfs, &linux_statfs); 498 free(bsd_statfs, M_STATFS); 499 if (error != 0) 500 return (error); 501 return (copyout(&linux_statfs, args->buf, sizeof(linux_statfs))); 502 } 503 504 struct l_ustat 505 { 506 l_daddr_t f_tfree; 507 l_ino_t f_tinode; 508 char f_fname[6]; 509 char f_fpack[6]; 510 }; 511 512 int 513 linux_ustat(struct thread *td, struct linux_ustat_args *args) 514 { 515 #ifdef DEBUG 516 if (ldebug(ustat)) 517 printf(ARGS(ustat, "%ju, *"), (uintmax_t)args->dev); 518 #endif 519 520 return (EOPNOTSUPP); 521 } 522 523 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 524 525 static int 526 stat64_copyout(struct stat *buf, void *ubuf) 527 { 528 struct l_stat64 lbuf; 529 530 bzero(&lbuf, sizeof(lbuf)); 531 lbuf.st_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8); 532 lbuf.st_ino = buf->st_ino; 533 lbuf.st_mode = buf->st_mode; 534 lbuf.st_nlink = buf->st_nlink; 535 lbuf.st_uid = buf->st_uid; 536 lbuf.st_gid = buf->st_gid; 537 lbuf.st_rdev = buf->st_rdev; 538 lbuf.st_size = buf->st_size; 539 lbuf.st_atim.tv_sec = buf->st_atim.tv_sec; 540 lbuf.st_atim.tv_nsec = buf->st_atim.tv_nsec; 541 lbuf.st_mtim.tv_sec = buf->st_mtim.tv_sec; 542 lbuf.st_mtim.tv_nsec = buf->st_mtim.tv_nsec; 543 lbuf.st_ctim.tv_sec = buf->st_ctim.tv_sec; 544 lbuf.st_ctim.tv_nsec = buf->st_ctim.tv_nsec; 545 lbuf.st_blksize = buf->st_blksize; 546 lbuf.st_blocks = buf->st_blocks; 547 548 /* 549 * The __st_ino field makes all the difference. In the Linux kernel 550 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 551 * but without the assignment to __st_ino the runtime linker refuses 552 * to mmap(2) any shared libraries. I guess it's broken alright :-) 553 */ 554 lbuf.__st_ino = buf->st_ino; 555 556 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 557 } 558 559 int 560 linux_stat64(struct thread *td, struct linux_stat64_args *args) 561 { 562 struct stat buf; 563 char *filename; 564 int error; 565 566 LCONVPATHEXIST(td, args->filename, &filename); 567 568 #ifdef DEBUG 569 if (ldebug(stat64)) 570 printf(ARGS(stat64, "%s, *"), filename); 571 #endif 572 573 error = linux_kern_stat(td, filename, UIO_SYSSPACE, &buf); 574 LFREEPATH(filename); 575 if (error) 576 return (error); 577 return (stat64_copyout(&buf, args->statbuf)); 578 } 579 580 int 581 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 582 { 583 struct stat sb; 584 char *filename; 585 int error; 586 587 LCONVPATHEXIST(td, args->filename, &filename); 588 589 #ifdef DEBUG 590 if (ldebug(lstat64)) 591 printf(ARGS(lstat64, "%s, *"), args->filename); 592 #endif 593 594 error = linux_kern_lstat(td, filename, UIO_SYSSPACE, &sb); 595 LFREEPATH(filename); 596 if (error) 597 return (error); 598 return (stat64_copyout(&sb, args->statbuf)); 599 } 600 601 int 602 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 603 { 604 struct stat buf; 605 int error; 606 607 #ifdef DEBUG 608 if (ldebug(fstat64)) 609 printf(ARGS(fstat64, "%d, *"), args->fd); 610 #endif 611 612 error = kern_fstat(td, args->fd, &buf); 613 translate_fd_major_minor(td, args->fd, &buf); 614 if (!error) 615 error = stat64_copyout(&buf, args->statbuf); 616 617 return (error); 618 } 619 620 int 621 linux_fstatat64(struct thread *td, struct linux_fstatat64_args *args) 622 { 623 char *path; 624 int error, dfd, flag; 625 struct stat buf; 626 627 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 628 return (EINVAL); 629 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 630 AT_SYMLINK_NOFOLLOW : 0; 631 632 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 633 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 634 635 #ifdef DEBUG 636 if (ldebug(fstatat64)) 637 printf(ARGS(fstatat64, "%i, %s, %i"), args->dfd, path, args->flag); 638 #endif 639 640 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 641 if (!error) 642 error = stat64_copyout(&buf, args->statbuf); 643 LFREEPATH(path); 644 645 return (error); 646 } 647 648 #else /* __amd64__ && !COMPAT_LINUX32 */ 649 650 int 651 linux_newfstatat(struct thread *td, struct linux_newfstatat_args *args) 652 { 653 char *path; 654 int error, dfd, flag; 655 struct stat buf; 656 657 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW) 658 return (EINVAL); 659 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) ? 660 AT_SYMLINK_NOFOLLOW : 0; 661 662 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd; 663 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd); 664 665 #ifdef DEBUG 666 if (ldebug(newfstatat)) 667 printf(ARGS(newfstatat, "%i, %s, %i"), args->dfd, path, args->flag); 668 #endif 669 670 error = linux_kern_statat(td, flag, dfd, path, UIO_SYSSPACE, &buf); 671 if (error == 0) 672 error = newstat_copyout(&buf, args->statbuf); 673 LFREEPATH(path); 674 675 return (error); 676 } 677 678 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 679 680 int 681 linux_syncfs(struct thread *td, struct linux_syncfs_args *args) 682 { 683 cap_rights_t rights; 684 struct mount *mp; 685 struct vnode *vp; 686 int error, save; 687 688 error = fgetvp(td, args->fd, cap_rights_init(&rights, CAP_FSYNC), &vp); 689 if (error != 0) 690 /* 691 * Linux syncfs() returns only EBADF, however fgetvp() 692 * can return EINVAL in case of file descriptor does 693 * not represent a vnode. XXX. 694 */ 695 return (error); 696 697 mp = vp->v_mount; 698 mtx_lock(&mountlist_mtx); 699 error = vfs_busy(mp, MBF_MNTLSTLOCK); 700 if (error != 0) { 701 /* See comment above. */ 702 mtx_unlock(&mountlist_mtx); 703 goto out; 704 } 705 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 706 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 707 save = curthread_pflags_set(TDP_SYNCIO); 708 vfs_msync(mp, MNT_NOWAIT); 709 VFS_SYNC(mp, MNT_NOWAIT); 710 curthread_pflags_restore(save); 711 vn_finished_write(mp); 712 } 713 vfs_unbusy(mp); 714 715 out: 716 vrele(vp); 717 return (error); 718 } 719